CN212979330U

CN212979330U - Screw oil press

Info

Publication number: CN212979330U
Application number: CN202020950718.8U
Authority: CN
Inventors: 高亚勤
Original assignee: Hubei Dongfanghong Grain Machinery Co ltd
Current assignee: Dongfanghong group (Hubei) Grain Machinery Co.,Ltd.
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-04-16
Anticipated expiration: 2030-05-29

Abstract

The utility model provides a screw oil press, including rotatable oil pressing shaft, oil pressing shaft's surface is equipped with the spiral tooth piece, and oil pressing shaft sets up in the pressing thorax that sets firmly, and the inner wall of pressing the thorax is equipped with and is used for filterable bar screen, and the bar screen cladding is in the periphery of spiral tooth piece, and shaft coupling and retarder connection are passed through to oil pressing shaft's one end, and oil pressing shaft's the other end passes through the bearing frame supporting in the frame, and oil pressing shaft's outer wall is equipped with just presses section and the section of squeezing again, just press the space volume between spiral tooth piece and the bar screen of section great, the space volume between the spiral tooth piece of section of squeezing again and bar screen is less, the section of squeezing again is located oil pressing shaft and is close to the one end of connecting the reduction gear. Through the improved arrangement structure of the oil pressing shaft, the heavy load position is closer to the speed reducer, the deformation of the far end of the oil pressing shaft is reduced, and therefore the service life of the oil pressing shaft is prolonged. The oil content of the oil residue at the residue discharge port is 9-11%, and the oil content is reduced by 1-3% compared with that of the conventional equipment.

Description

Screw oil press

Technical Field

The utility model relates to an oil equipment field of making, especially a screw oil press.

Background

The existing large-scale screw oil press is generally used for pressing oil from high-oil-content vegetable oil materials such as cotton seeds, rapeseed, sunflower seeds, peanuts and the like, and in order to improve the oil pressing efficiency, the screw shaft is generally set to be of a multi-stage structure with different screw pitches. For example, chinese patent document CN202895733U discloses a single screw shaft oil press. Generally, the screw shaft is provided with a feed port at one end close to the reduction gear and a discharge port at one end far from the reduction gear, for example, as described in chinese patent document CN 202367960U. The inventor finds that in a large oil pressing mechanism, the diameter of a shaft is large, the processing efficiency is high, the length of the shaft reaches 2 meters, and under a low-speed high-load working condition, the oil pressing shaft has the problem of deformation, and the larger the end with the smaller pitch, the larger the load is, and the larger the deformation is. The abrasion of the speed reducer, the bearing and some movable mechanisms is easily increased, and the service life of the equipment is influenced. The oil residue oil content of the existing large-scale oil pressing mechanism is hardly lower than 12%.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a screw oil press is provided can prolong the life of equipment, especially screw axis and reduction gear. In a preferred embodiment, the oil content of the oil cake can be reduced.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a spiral oil press, includes rotatable oil pressing shaft, and oil pressing shaft's surface is equipped with the spiral tooth piece, and oil pressing shaft sets up in the pressing thorax that sets firmly, and the inner wall of pressing the thorax is equipped with and is used for filterable bar screen, and the bar screen cladding is in the periphery of spiral tooth piece, and shaft coupling and retarder connection are passed through to the one end of oil pressing shaft, and oil pressing shaft's the other end passes through the bearing frame bearing in the frame, and oil pressing shaft's outer wall is equipped with just section of squeezing and the section of squeezing again, just press the space volume between the spiral tooth piece of section and the bar screen great, the space volume between the spiral tooth piece of section of squeezing again and the bar screen is less, the section of squeezing again is located oil pressing shaft and is close to the one.

In the preferred scheme, the diameter of the circumscribed circle of the re-pressing section is smaller than that of the primary pressing section;

the inner diameter of the barrel corresponding to the re-squeezing section is smaller than that of the barrel corresponding to the initial squeezing section;

an inner conical surface connecting ring is arranged between the two sections of the squeezing hearths.

In the preferred scheme, the clearance between the inner wall of the barrel corresponding to the initial pressing section and the top of the spiral tooth blade of the initial pressing section is larger than the clearance between the inner wall of the barrel corresponding to the re-pressing section and the top of the spiral tooth blade of the re-pressing section.

In the preferred scheme, a fixed slag discharging flange is arranged at one end of the pressing chamber close to the speed reducer, a slag discharging hole is arranged on the slag discharging flange, the inner diameter of one end of the slag discharging hole close to the pressing chamber is smaller, and the inner diameter of one end of the slag discharging hole far away from the pressing chamber is larger;

the slag outlet is positioned at the periphery of the oil extracting shaft.

In the preferred scheme, still be equipped with the axle sleeve of slagging tap at the outer wall of the axle that extracts oil, the axle sleeve of slagging tap is less near the one end external diameter of pressing the thorax, and the one end external diameter of keeping away from pressing the thorax is great, and the axle sleeve of slagging tap stretches out outside the slag notch near the one end of pressing the thorax.

In the preferred scheme, the end of the slag hole close to the barrel is also provided with an inverted cone section, the inner diameter of the inlet of the inverted cone section is larger, the inner diameter far away from the inlet is smaller, and the length of the inverted cone section is smaller than 1/3 of the length of the whole slag hole.

In the preferable scheme, in the speed reducer, one end of a shaft of a spiral tooth worm wheel is connected with a coupler, and the other end of the shaft is supported on a rack through a conical roller bearing so as to bear radial force and axial tension;

the spiral bevel gear is meshed with the spiral worm gear;

the teeth of the helical worm gear and the helical bevel gear are both in hard tooth surface structures.

In the preferred scheme, spiral bevel gear and spiral worm wheel seal set up in the casing of reduction gear, are equipped with oil inlet and oil return opening on the casing, and oil inlet and oil return opening pass through the pipeline and are connected with the lubricating-oil tank, are equipped with the oiling pump on the pipeline of oil inlet, give the flank of tooth cooling of spiral bevel gear and spiral worm wheel contact position through endless lubricating oil.

In the preferred scheme, the barrel is positioned in an oil pressing tank, the bottom of the oil pressing tank is provided with an auger shaft, the auger shaft is connected with the oil pressing shaft through a transmission mechanism, and the auger shaft is driven to rotate by the oil pressing shaft.

In a preferred scheme, a heating feed hopper is further arranged above the oil pressing box, a mixing device driven by a mixing motor is arranged in the heating feed hopper, and a heating device is arranged in the heating feed hopper and used for heating oil;

a feeding hole is formed in the top of the heating feeding hopper, a feeding port is formed in one side of the bottom of the heating feeding hopper, a feeding shaft driven by a feeding motor is arranged in the feeding port, and a spiral blade is arranged on the outer wall of the feeding shaft;

the bottom of the feed port is positioned above the initial pressing section of the oil pressing shaft.

The utility model provides a pair of screw oil press through the modified axle arrangement structure that extracts oil, makes the position of heavy load more be close to the reduction gear, reduces the deformation of the axle distal end that extracts oil to improve the life of the axle that extracts oil. The speed reducer adopts a structure of transmission of a spiral-tooth worm wheel and a spiral-tooth bevel gear, the transmission torque can reach 13000 N.M, the transmission ratio is 22-26, and the optimal transmission ratio is 25.26. The circulating lubricating oil that sets up can assist the reduction gear cooling, further prolongs the life of reduction gear. The cooperation structure of the barrel and the oil squeezing shaft further improves the oil yield, and tests show that the oil content of oil residue at the tail end of the primary squeezing section is 29% and the oil content of oil residue at the residue discharge port is 9% -11% by taking rapeseeds as an example, and the oil content is reduced by 1% -3% compared with that of the conventional equipment.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a front view of the present invention.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic view of the internal structure of the speed reducer.

In the figure: heating feeder hopper 1, feed inlet 2, mix motor 3, feeding motor 4, pay-off axle 5, the axle 6 that extracts oil, press section 61 for just, press section 62 again, optical axis section 63, drive mechanism 7, press thorax 8, interior conical surface go-between 81, the case 9 that extracts oil, interior storage bucket 91, auger shaft 10, slag discharging port 11, slag notch 12, back taper section 121, safety cover 13, shaft coupling 14, reduction gear 15, conical roller bearing 16, helical tooth worm wheel 17, helical tooth bevel gear 18, frame 19, slag discharging flange 20, slag discharging shaft sleeve 21, feed inlet 22, oil drain 23.

Detailed Description

As shown in fig. 1 to 3, a screw oil press includes a rotatable oil pressing shaft 6, a screw tooth piece is provided on the surface of the oil pressing shaft 6, the oil pressing shaft 6 is disposed in a fixed pressing chamber 8, a grid net for filtering is provided on the inner wall of the pressing chamber 8, the grid net is wrapped on the periphery of the screw tooth piece, one end of the oil pressing shaft 6 is connected with a speed reducer 15 through a coupling 14, the other end of the oil pressing shaft 6 is supported on a frame 19 through a bearing seat, a primary pressing section 61 and a secondary pressing section 62 are provided on the outer wall of the oil pressing shaft 6, the space volume between the screw tooth piece of the primary pressing section 61 and the grid net is large, the space volume between the screw tooth piece of the secondary pressing section 62 and the grid net is small, and the secondary pressing section 62 is located at one end of the oil pressing shaft 6 close to the speed reducer 15. Oil materials such as cotton seeds, rapeseed, sunflower seeds, peanuts and the like enter the primary pressing section 61 to be pressed against each other, the torque is relatively low, the volume of the oil materials is further pressed after entering the secondary pressing section 62, the torque is relatively high, and the deformation of the oil pressing shaft 6 is relatively small due to the fact that the oil pressing shaft is close to the speed reducer 15, so that the service life of the oil pressing shaft 6 is prolonged.

The preferable scheme is as shown in figure 1, the diameter of the circumscribed circle of the re-pressing section 62 is smaller than that of the initial pressing section 61; the inner diameter of the barrel 8 corresponding to the re-squeezing section 62 is smaller than that of the barrel 8 corresponding to the primary squeezing section 61; with the structure, the oil has a larger compression ratio from the primary pressing section 61 to the secondary pressing section 62, thereby improving the oil extraction efficiency.

An inner conical surface connecting ring 81 is arranged between the two sections of the squeezing chambers 8. With the structure, the oil extraction efficiency of the initial extraction section 61 is improved, and the oil content of the oil residue at the position is reduced. By adopting the structure through testing, the oil content of the oil residue discharged from the primary pressing section 61 can be reduced by 1-2%. The inner conical surface connecting ring 81 is preferably made of alloy steel materials such as 20CrMnTi, 20CrMnMo and 17CrNiMo6, and is subjected to surface carburizing and quenching treatment.

In a preferred scheme, as shown in fig. 1, the clearance between the inner wall of the barrel 8 corresponding to the primary pressing section 61 and the top of the helical tooth blade of the primary pressing section 61 is larger than the clearance between the inner wall of the barrel 8 corresponding to the secondary pressing section 62 and the top of the helical tooth blade of the secondary pressing section 62. With the structure, the primary pressing section 61 can contain more oil, and after entering the secondary pressing section 62, the volume of the oil is greatly compressed, so that the oil pressing efficiency is improved, and the oil yield is improved by matching with the structure of the inner conical surface connecting ring 81.

In a preferable scheme, as shown in fig. 1, a fixed slag discharging flange 20 is arranged at one end of the pressing chamber 8 close to the speed reducer 15, a slag discharging hole 12 is arranged on the slag discharging flange 20, the inner diameter of one end of the slag discharging hole 12 close to the pressing chamber 8 is smaller, and the inner diameter of one end far away from the pressing chamber 8 is larger;

the slag outlet 12 is located at the periphery of the oil extracting shaft 6. By the structure, the slag can be prevented from being blocked at the slag discharging position, and the slag discharging is smooth.

The preferable scheme is as shown in fig. 1 and 2, a slag-out shaft sleeve 21 is further arranged on the outer wall of the oil pressing shaft 6, the outer diameter of one end, close to the pressing chamber 8, of the slag-out shaft sleeve 21 is smaller, the outer diameter of one end, far away from the pressing chamber 8, of the slag-out shaft sleeve 21 is larger, and one end, close to the pressing chamber 8, of the slag-out shaft sleeve 21 extends out of the slag outlet 12. The structure is convenient for guiding the oil residue to be discharged, and the oil squeezing shaft 6 is prevented from being tightly held, so that the rotation of the oil squeezing shaft 6 is influenced.

In a preferred scheme, as shown in fig. 1 and 2, a reverse taper section 121 is further arranged at one end of the slag hole 12 close to the press barrel 8, the inner diameter of the inlet of the reverse taper section 121 is larger, the inner diameter far away from the inlet is smaller, and the length of the reverse taper section 121 is smaller than 1/3 of the length of the whole slag hole 12. According to the structure, the oil residue can be further squeezed on the premise of not influencing slag discharge, so that the oil yield is improved, and the oil content of the oil residue is further reduced by 1% -2% through the structure after measurement and calculation.

In the preferred scheme as shown in fig. 1 and 3, in the speed reducer 15, one end of a shaft of a helical gear worm wheel 17 is connected with a coupling 14, and the other end is supported on a frame 19 through a conical roller bearing 16 so as to bear radial force and axial tension;

the spiral bevel gear 18 is meshed with the spiral worm gear 17;

the teeth of the helical worm gear 17 and the helical bevel gear 18 are both in a hard tooth surface structure. In the embodiment, a hard tooth surface transmission structure is adopted, so that the service life of the speed reducer is further prolonged, the hard tooth surface structure adopts low-carbon alloy steel such as 20CrMnTi, 20CrMnMo or 17CrNiMo6 and the like, and the surface hardness of the tooth can reach more than HRC61 after surface carburization and quenching. The conical roller bearing 16 is arranged to overcome the axial tension generated during the transmission of the helical gear worm wheel 17 and the helical bevel gear 18.

In the preferred scheme, spiral bevel gear 18 and spiral worm gear 17 are arranged in the shell of speed reducer 15 in a sealing manner, an oil inlet and an oil return port are arranged on the shell, the oil inlet and the oil return port are connected with a lubricating oil tank through a pipeline, an oil injection pump is arranged on the pipeline of the oil inlet, and the temperature of the tooth surface of the contact position of spiral bevel gear 18 and spiral worm gear 17 is reduced through circulating lubricating oil. The oil inlet, oil return and oil pump arrangement is not shown in the figures. With this structure, the temperature of the reduction gear 15 is further reduced by the circulating lubricating oil, and the service life of the reduction gear 15 is prolonged.

The preferable scheme is as shown in fig. 1, the barrel 8 is located in the oil pressing box 9, the bottom of the oil pressing box 9 is provided with the auger shaft 10, the auger shaft 10 is connected with the oil pressing shaft 6 through the transmission mechanism 7, preferably, the transmission mechanism 7 is a chain transmission mechanism, and the auger shaft 10 is driven to rotate by the oil pressing shaft 6. With the structure, heavy sediments contained in the oil can be prevented from precipitating at the bottom of the oil pressing tank 9, so that subsequent cleaning is difficult.

In a preferred scheme, as shown in fig. 1, a heating feed hopper 1 is further arranged above an oil pressing box 9, a mixing device driven by a mixing motor 3 is arranged in the heating feed hopper 1, a heating device is arranged in the heating feed hopper 1, and the heating device preferably adopts an electric heating wire heater or a microwave heater and is used for heating oil to 60-85 ℃, preferably 70-75 ℃ so as to improve the oil yield; in this embodiment, a microwave heater is preferably used, which can reduce the water content in the oil and increase the oil yield.

A feeding hole 2 is formed in the top of the heating feeding hopper 1, a feeding opening 22 is formed in one side of the bottom of the heating feeding hopper 1, a feeding shaft 5 driven by a feeding motor 4 is arranged in the feeding opening 22, and spiral blades are arranged on the outer wall of the feeding shaft 5;

the bottom of the feedwell 22 is located above the initial pressing section 61 of the oil extracting shaft 6 for feeding the initial pressing section 61.

During the use as in figure 1, the oil is sent into heating feeder hopper 1 through feed inlet 2 in, start heating device, heat the oil to 70~75 ℃, start mixing motor 3 simultaneously, drive the mixing device in the heating feeder hopper 1, after the oil temperature reached, open the gate in feed opening 22 position, fry hot oil and enter into feed opening 22 in, start feeding motor 4, it is rotatory to drive pay-off axle 5, it is rotatory to start the motor that extracts oil and drive the axle of squeezing oil 6, the motor that extracts oil is not shown in the figure. The helical blade on the feeding shaft 5 pushes oil materials to the primary pressing section 61 of the oil pressing shaft 6, after extrusion, the oil is filtered from the grid of the pressing chamber 8 and then discharged into the oil pressing box 9, the primary pressed oil residues enter the secondary pressing section 62 after primary extrusion at the position of the inner conical surface connecting ring 81, the oil residues at the position of the secondary pressing section 62 are further extruded, the diameter of the root circle of the secondary pressing section 62 in the embodiment is further increased, the volume between the helical tooth sheets of the secondary pressing section 62 is further reduced, the anti-torque performance of the oil pressing shaft 6 is further improved, the helical tooth sheets at the secondary pressing section 62 have different screw pitches, the screw pitch at one end close to the speed reducer 15 is smaller, and the screw pitch at the end far away from the speed reducer 15 is larger. The one end that is close to reduction gear 15 after the section 62 is pressed again to the axle 6 that extracts oil still is equipped with optical axis section 63, and there is not the spiral tooth piece in this department, and the dregs of fat is further extruded and the plastic at optical axis section 63 to further squeezed again when the back taper section 121 through slag notch 12, behind back taper section 121, the pressure of dregs of fat disappears, is broken behind a vertical pole and falls into row cinder notch 11 and be discharged. A protective cover 13 is provided around the coupling 14 to prevent oil residue from entering the coupling 14 or the transmission. The oil squeezing shaft 6 simultaneously drives the auger shaft 10 to rotate, and the auger shaft 10 is provided with helical blades, so that firstly, oil is stirred to avoid precipitation, and secondly, the oil is discharged from an oil discharge port at one end of the auger shaft 10.

The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. The utility model provides a screw oil press, including rotatable axle (6) of squeezing oil, the surface of axle (6) of squeezing oil is equipped with the spiral flute profile, it sets up in the thorax (8) of squeezing oil that set firmly to squeeze oil axle (6), the inner wall of the thorax (8) of squeezing oil is equipped with and is used for filterable grid, the grid cladding is in the periphery of spiral flute profile, the one end of axle (6) of squeezing oil is passed through shaft coupling (14) and is connected with reduction gear (15), the other end of axle (6) of squeezing oil passes through the bearing frame supporting in frame (19), characterized by: the outer wall of the oil squeezing shaft (6) is provided with a primary squeezing section (61) and a secondary squeezing section (62), the volume of the space between the spiral tooth piece of the primary squeezing section (61) and the grid net is large, the volume of the space between the spiral tooth piece of the secondary squeezing section (62) and the grid net is small, and the secondary squeezing section (62) is located at one end, close to the connecting speed reducer (15), of the oil squeezing shaft (6).

2. The screw oil press according to claim 1, wherein: the diameter of the circumscribed circle of the re-pressing section (62) is smaller than that of the circumscribed circle of the primary pressing section (61);

the inner diameter of the barrel (8) corresponding to the re-squeezing section (62) is smaller than that of the barrel (8) corresponding to the primary squeezing section (61);

an inner conical surface connecting ring (81) is arranged between the two sections of the squeezing chambers (8).

3. The screw oil press according to claim 2, wherein: the clearance between the inner wall of the barrel (8) corresponding to the primary squeezing section (61) and the top of the spiral tooth blade of the primary squeezing section (61) is larger than the clearance between the inner wall of the barrel (8) corresponding to the secondary squeezing section (62) and the top of the spiral tooth blade of the secondary squeezing section (62).

4. The screw oil press according to claim 1, wherein: a slag discharging flange (20) is fixedly arranged at one end of the barrel (8) close to the speed reducer (15), a slag discharging hole (12) is formed in the slag discharging flange (20), the inner diameter of one end, close to the barrel (8), of the slag discharging hole (12) is smaller, and the inner diameter of one end, far away from the barrel (8), of the slag discharging hole is larger;

the slag outlet (12) is positioned at the periphery of the oil extracting shaft (6).

5. The screw oil press according to claim 4, wherein: the outer wall of the oil pressing shaft (6) is also provided with a slag discharging shaft sleeve (21), the outer diameter of one end, close to the barrel (8), of the slag discharging shaft sleeve (21) is smaller, the outer diameter of one end, far away from the barrel (8), of the slag discharging shaft sleeve (21) is larger, and one end, close to the barrel (8), of the slag discharging shaft sleeve (21) extends out of the slag outlet (12).

6. The screw oil press according to claim 5, wherein: one end of the slag hole (12) close to the barrel (8) is also provided with an inverted cone section (121), the inner diameter of the inlet of the inverted cone section (121) is larger, the inner diameter far away from the inlet is smaller, and the length of the inverted cone section (121) is smaller than 1/3 of the length of the whole slag hole (12).

7. The screw oil press according to claim 1, wherein: in the speed reducer (15), one end of a shaft of a spiral tooth worm wheel (17) is connected with a coupling (14), and the other end of the shaft is supported on a rack (19) through a conical roller bearing (16) so as to bear radial force and axial tension;

the spiral bevel gear (18) is meshed with the spiral worm gear (17);

the teeth of the spiral-tooth worm wheel (17) and the spiral-tooth bevel gear (18) are both in hard tooth surface structures.

8. The screw oil press according to claim 7, wherein: spiral bevel gear (18) and spiral worm gear (17) are sealed and arranged in the shell of speed reducer (15), an oil inlet and an oil return port are arranged on the shell, the oil inlet and the oil return port are connected with a lubricating oil tank through a pipeline, an oil injection pump is arranged on the pipeline of the oil inlet, and the tooth surface of the contact position of spiral bevel gear (18) and spiral worm gear (17) is cooled through circulating lubricating oil.

9. The screw oil press according to claim 1, wherein: the barrel (8) is positioned in the oil pressing tank (9), the bottom of the oil pressing tank (9) is provided with the packing auger shaft (10), the packing auger shaft (10) is connected with the oil pressing shaft (6) through the transmission mechanism (7), and the packing auger shaft (10) is driven to rotate by the oil pressing shaft (6).

10. The screw oil press according to claim 9, wherein: a heating feed hopper (1) is also arranged above the oil pressing box (9), a mixing device driven by a mixing motor (3) is arranged in the heating feed hopper (1), and a heating device is arranged in the heating feed hopper (1) and used for heating oil;

a feeding hole (2) is formed in the top of the heating feeding hopper (1), a feeding opening (22) is formed in one side of the bottom of the heating feeding hopper (1), a feeding shaft (5) driven by a feeding motor (4) is arranged in the feeding opening (22), and spiral blades are arranged on the outer wall of the feeding shaft (5);

the bottom of the feed opening (22) is positioned above the initial pressing section (61) of the oil pressing shaft (6).